Symlink attack due to predictable tmp folder names Affecting npm package, versions [,1.3.3)



    Attack Complexity Low
    User Interaction Required
NVD  medium

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  • Snyk ID SNYK-DOTNET-NPM-60199
  • published 13 Feb 2017
  • disclosed 22 Apr 2014
  • credit Daniel Kahn Gillmor

How to fix?

Upgrade npm to version 1.3.3 or higher.


npm is a package manager for JavaScript. Affected versions of the package are vulnerable to Symlink attack due to predictable tmp folder names, which were named /tmp/npm-$PID. An attacker waiting for a process named npm- to load could then go to the folder and arbitrarily change the files in the tmp folder.